Impingement mixing device with pressure controlled nozzle adjustment

Abstract

A closed loop feedback control for a high pressure impingement mixing system. The high pressure impingement mixing device is equipped with a circulation loop containing both a pressure sensor and a flow volume meter. Constant pressure and flow volume is achieved by continuous closed feedback loop monitoring of the pressure and flow volume to effect a change in an adjustable pump setting and servo displaceable nozzle needle. The nozzle needle adjustment allows maintaining the appropriate pressure and volume on a continuous spaces. It also allows altering component ratios and/or flow volumes during a shot in order to affect a change in material or flow characteristics of a produced part.

I claim: 
     
       1. An impingement mixing head comprising: means for defining a component impingement zone;   at least two means for introducing component into said impingement zone connected to said means for defining;   wherein said means for introducing includes:   an axially displaceable nozzle needle arranged in a nozzle housing connected to said means for defining;   a continuously adjustable drive connected to said nozzle needle.   
     
     
       2. An impingement mixing head according to claim 1, wherein said drive comprises: a servo-motor connected to said housing; and   an adjusting spindle means for translating rotational motion of said servo-motor to axial displacement of said nozzle needle, coupling said servo-motor to said nozzle needle.   
     
     
       3. An impingement mixing head according to claim 2, wherein said adjusting spindle exhibits a rotating portion connected to said servo-motor and an axially moving portion, rotationally set by a spline key, connected to said nozzle needle, wherein said rotating portion and said axially moving portion are joined by a threaded portion.